{"id":"CVE-2019-10190","aliases":["ALPINE-CVE-2019-10190","DEBIAN-CVE-2019-10190","DLA-3795-1","EUVD-2019-2213","GHSA-5pqr-9wpj-5m82","UBUNTU-CVE-2019-10190","USN-7047-1"],"status":"published","title":"A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0...","description":"A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.","severity":{"version":"3.0","score":5.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01993,"percentile":0.80825,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2019-07-10T12:00:00Z","modified":"2026-11-03T06:32:29Z","fixes":[{"ecosystem":"Alpine:v3.11","package":"knot-resolver","fixed_in":["4.1.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.12","package":"knot-resolver","fixed_in":["4.1.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"knot-resolver","fixed_in":["4.1.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"knot-resolver","fixed_in":["4.1.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"knot-resolver","fixed_in":["4.1.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"knot-resolver","fixed_in":["4.1.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"knot-resolver","fixed_in":["4.1.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"knot-resolver","fixed_in":["4.1.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"knot-resolver","fixed_in":["4.1.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"knot-resolver","fixed_in":["4.1.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"knot-resolver","fixed_in":["4.1.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"knot-resolver","fixed_in":["4.1.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"knot-resolver","fixed_in":["4.1.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"knot-resolver","fixed_in":["4.1.0-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"knot-resolver","fixed_in":["5.0.1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"knot-resolver","fixed_in":["5.0.1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"knot-resolver","fixed_in":["5.0.1-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"knot-resolver","fixed_in":["3.2.1-3ubuntu2.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.11","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.12","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.13","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.14","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.15","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.16","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.17","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.1-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.1-1"}]}]},{"source":"osv","ecosystem":"Debian:10","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.1-3+deb10u2"}]}],"versions":["3.2.1-3","3.2.1-3+deb10u1"],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.1-3ubuntu2.2"}]}],"versions":["3.2.1-3","3.2.1-3ubuntu1","3.2.1-3ubuntu2","3.2.1-3ubuntu2.1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.1-3ubuntu2.2"}]}],"versions":["3.2.1-3","3.2.1-3ubuntu1","3.2.1-3ubuntu2","3.2.1-3ubuntu2.1"],"bundled":4}],"products":[{"vendor":"cz.nic","product":"knot-resolver"},{"vendor":"fedoraproject","product":"fedora"},{"vendor":"nic","product":"knot_resolver"}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10190","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","Third Party Advisory","report"]},{"url":"https://www.knot-resolver.cz/2019-07-10-knot-resolver-4.1.0.html","tags":["x_refsource_CONFIRM","x_transferred","Release Notes","Vendor Advisory","advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZV5YZZ5766UIG2TFLFJL6EESQNAP5X5/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html","tags":["x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-10190"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZV5YZZ5766UIG2TFLFJL6EESQNAP5X5"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VZV5YZZ5766UIG2TFLFJL6EESQNAP5X5"},{"url":"https://github.com/advisories/GHSA-5pqr-9wpj-5m82"},{"url":"https://security.alpinelinux.org/vuln/CVE-2019-10190","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2019-10190","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2019-10190","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-10190","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-7047-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2019-10191","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2019-19331","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-12667","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2019-10190","description":"A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.","status":"published","published":"2019-07-16T17:50:05Z","modified":"2025-02-13T16:27:20.781Z","cvss":[{"version":"3.0","score":5.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:20:19.056416Z"}],"euvd":[{"id":"EUVD-2019-2213","description":"A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.","status":"published","published":"2019-07-16T17:50:05Z","modified":"2025-02-13T16:27:20Z","cvss":[{"version":"3.0","score":5.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T00:03:53.290549Z"}],"ghsa":[{"id":"GHSA-5pqr-9wpj-5m82","title":"A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0...","description":"A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.","status":"published","published":"2022-05-24T16:50:26Z","modified":"2024-05-06T05:03:41Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:57:19.595262Z"}],"nvd":[{"id":"CVE-2019-10190","description":"A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.","status":"published","published":"2019-07-16T18:15:12.087Z","modified":"2026-06-17T02:10:27.193Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"},{"version":"3.0","score":5.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:05:19.195714Z"}],"osv":[{"id":"ALPINE-CVE-2019-10190","description":"A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.","status":"published","published":"2019-07-16T18:15:12.087Z","modified":"2026-11-03T06:32:29.087049491Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-03T07:17:41.158523Z"},{"id":"CVE-2019-10190","description":"A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.","status":"published","published":"2019-07-16T18:15:12.087Z","modified":"2026-10-24T10:30:53.090529037Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:10.383287Z"},{"id":"DEBIAN-CVE-2019-10190","description":"A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.","status":"published","published":"2019-07-16T18:15:12.087Z","modified":"2026-09-21T07:00:35.180292578Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:45:31.170944Z"},{"id":"UBUNTU-CVE-2019-10190","description":"A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.","status":"published","published":"2019-07-10T12:00:00Z","modified":"2026-02-04T02:46:58.020781Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"},{"version":"3.0","score":5.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:19.202697Z"},{"id":"DLA-3795-1","title":"knot-resolver - security update","status":"published","published":"2024-04-26T00:00:00Z","modified":"2026-03-09T01:18:07.178802Z","updated_at":"2026-11-02T15:46:12.203458Z"},{"id":"USN-7047-1","title":"knot-resolver vulnerabilities","description":"Vladimír Čunát discovered that Knot Resolver incorrectly handled input\nduring DNSSEC validation. A remote attacker could possibly use this issue\nto bypass certain validations. (CVE-2019-10190)\n\nVladimír Čunát discovered that Knot Resolver incorrectly handled input\nduring DNSSEC validation. A remote attacker could possibly use this issue\nto downgrade DNSSEC-secure domains to a DNSSEC-insecure state, resulting \nin a domain hijacking attack. (CVE-2019-10191)\n\nVladimír Čunát discovered that Knot Resolver incorrectly handled certain \nDNS replies with many resource records. An attacker could possibly use \nthis issue to consume system resources, resulting in a denial of service.\n(CVE-2019-19331)\n\nLior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Knot\nResolver incorrectly handled certain queries. A remote attacker could \nuse this issue to perform an amplification attack directed at a target.\n(CVE-2020-12667)\n","status":"published","published":"2024-10-01T06:53:06Z","modified":"2026-04-27T17:47:13.764053897Z","updated_at":"2026-11-02T16:58:18.876384Z"}]}}